Kinetic and Adsorption Studies of a Thiazine and Triarylmethane Dye onto Bamboo Impregnated Nanoscale Manganese

Solomon E. Shaibu*, Folahan A. Adekola, Halimat I. Adegoke, Olushola S. Ayanda 

In this study, bamboo impregnated with nanoscale manganese (BMn) was prepared by the aqueous phase borohydride reduction method and characterized using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and PIXE analysis. The synthesized nMn-bamboo (BMn) was subsequently applied for the sorption of methylene blue (MB) and acid violet 19 (AV 19) from aqueous solution representing a thiazine and a triarylmethane class of dyes, respectively. Batch adsorptions of MB and AV 19 dyes were investigated under various experimental conditions such as pH, contact time, initial concentration of dyes and adsorbent dosage. The results showed that the synthesized BMn is an effective adsorbent with a high MB and AV 19 dyes adsorption capacity above 180 mg/L for both dyes. At concentration 120 mg/L, usage of 0.02 g of BMn resulted to 263.5 and 187.2 mg/g removal efficiency for MB and AV 19, respectively at 165 rpm for a period of 120 min and at a solution pH of 7.6. The equilibrium data were best represented by Freundlich isotherm model and the pseudo-second order kinetic model better explained the kinetic data.